Steam-engine



UNITED STATES PATEN T OFFICE,

GEORGE F. LOMBARD, OF 'NEW ORLEANS, LOUISIANA.

STEAM-ENGINE.

Specification of Letters Patent No. 23,992, dated May 10, 1859.

To all whom it may concern:

Be it known that I, GEORGE F. LOMBARD, of the city and parish of New Orleans and State of Louisiana, have invented a new and useful Improvement in Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1, is a side elevation. Fig. 2, a ground plan. Fig. 3, reverse side of wheel from Fig. l. Fig. 4, sinks for bearings, and Fig. 5, cross section of movable block and beam.

Similar letters of reference, in each of the several figures indicate corresponding parts.

My invention consists 1st. in the relative arrangement of two cylinders, four pistons, two rocking beams, two steam chests with valves and the specified connections which combine and operate the same, in the manner and for the purpose herein set forth. 2nd. In the application of the exhaust steam of the engine to the crank or eccentric shaft through a fly wheel constructed and combined with the engine and crank shaft in the manner herein described; whereby the crank is relieved at its dead points and the leverage of the fiy wheel and the power of the waste and' exhausting steam employed in the most available manner for assisting in the propulsion of the engine.

This engine has two cylinders, used without cylinder heads. Each cylinder has two pistons, and the action of the steam is to separate the pistons. Each cylinder is single acting, and their action alternately; therefore by the use of two cylinders the action of the steamon the crank is in both directions; when the pistons in one cylinder are forced apart, those of the other assume the proper -position for the action of the steam.

To enable others, skilled in the art, to make and use my invention, I will proceed to describe its construction and operation.

The cylinders stand in a vertical position and are attached to the frame z. The pistons of the two cylinders marked c, d, and g, 7L, are connected to beams by means of links r. The steam is admitted into the cylinders by the steam chests Z and lml which are furnished with valves which operate the same as ordinary slide valves excepting that the steam ports lead directly to the center of the cylinders and between the pistons. In

the center of the frame to which the cylinders are mounted, are the slotted frames a, seen in Fig. l; having a movable block working in the slot, the center of which is marked b, in Fig. l, and a cross section of it illustrated by Fig. 5. To these movable blocks the pitman s, is attached, also the links a, cl, which make its connection to the beams, one above and the other below the cylinders. The pistons being connected to the beams at one end by the links r, by the use of a long bar 0, which passes through this end of the beam and admits the links a, d, to be attached to the beam from the same center as the attachment to the pitmen. By this connection, the pitman has an equal motion as the two pistons, or the crank t, on the shaft of the wheel w, has a length equal to the movement of each piston. In Fig. 2, the circular bar g, is shown supporting and confining the links or toggle a, c, Z, and the movable blocks held firmly in the slots. The eccentric w, with its rod c, acting on the arms p, n, 0, and g, r, with their connecting rods s', moves the slide valves in the steam chests. l

The beams are mounted on the frames a, in pillar blocks; having the journals on cross bars y', lo, which pass through the beams to support and give the center of vibration.

The pipes leading from the steam chest, uniting at 1 passing into the wheel shaft at a, are the escape pipes. The shaft being hollow and the steam entering the rim cl2, which is also hollow and escaping from thence through the opening a2, against the ledges c, in the wheel its action against the ledges gives an impetus to the wheel and thus assists in operating the engine.

Vhat I claim as my invention and desire to secure by Letters Patent, is-

1. The relative arrangement of two cylinders, four pistons, two rocking beams, two steam chests with valves and the specied connections which combine and operate the same, in the manner and for the purpose herein set forth.

2. The application of the exhaust steam of the engine to the crank or eccentric shaft through a fly wheel constructed and combined with the engine and crank shaft, substantially as and for the purposes set forth.

GEORGE F. LOMBARD.

Witnesses AUGUSTE PEARGE, AUGUSTE MARGos. 

